Carbureter.



A. COSTA.

CARBURETER.

APPLICATION FILED owe. I9I5- I]. $53 577. Patented Jan. 15, 1918.

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UNTTEU @TATEfi PATENT @FFTQE ANTHONY UOSTA, OF CLEVELAND, OHIO, ASSIGNOBTO THE GRAVITY CABBURETER COMPANY, OE CLEVELAND, OHIO, A CORPORATION 015OHIO.

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Speci cation of Lettera Patent.

Application filed December 3, 1915. serial No. 641,911.

To all whom it may concern:

Be it known that I, ANTHONY Co's'rA, a citizen of the United States, anda resident of Cleveland, county of Cuyahoga and State of Ohio, haveinvented a new and useful Improvement in Carburetors, of which thefollowing is a specification,.the principle of the invention beingherein explained and the best mode in which have contemplated applyingthat rinciple, so as to distinguish it from other inventions.

The present improvements relate to a carbureter of the type in which thefuel supply is controlled directly by a valve, which is inturn-controlled by means of the suction.

in the manifold leading to the engine, so that as soon as the enginestops and the suction in the manifold is reduced to zero, the fuelsupply valve willbe closed. The chief difi-- culty in the past with thistype of carbu-.

reters, which are usually known as mixing valves, has been to secure aproper regulation of the mixture,=and to vary the amount of fuel inproportion to the amount of air that is drawn through the carbureter.The present invention has been developed to provide a means for securinga very accurate control of the amounts of gasolene and air, whichmeansmay be adjusted in a simple manner from the outside of the carburetor.

To the accomplishment of the foregoing andnism embodying the invention,such dis-- closed means constitutin however, but one of variousmechanical orms in which the principle of the invention may be used.

In said annexed drawing Figure 1 is a plan viewof my device; Fig. 2 is avertical section on the line 2-2 Fig. 1; Fig. 3 is a section on the line3-3, Fig. 2;-and Fig. 4 is a section on the line M, Fig. 2.

A casing 1 of any suitable type may be provided, although preferablythis casing will he as small as possible, and of the constructionillustrated in Figs. 1 and 3, in which it is shown as a verticallycylindrical casing having a lateral air opening 2 in one side, and afuel supply conduit 3 extending centrally through the air opening andthen leading exteriorly of the same to a connection 4:. Vertically, andpreferably centrally disposed in the casing 1, is a conduit 5,connection to the fuel supply conduit 3, andprovided both above andbelow the point of connection with stufing boxes 6 and 7.

Mounted upon the upper end of the conduit 5, is a fuel supply nozzleShaving preferably a lateral discharge, and 'as here shown, a pluralityof such lateral discharge openings 9. This discharge nozzle is formedwith a vertically projecting extension 10 which is provided with acentral passage 11 therethrough, adapted to receive a rod 12 provided atits lower end with a neetlle valve 13 for the purpose of closing thefuel supply conduits in the same manner to be explained hereinafter.Attached to the rod 12 by means of a yoke 14 is a ring 15 constructed tonormally partially close the passage to the casing about the nozzle andto also substantially close the discharge ends of these nozzles as shownin Fig. 1. Furthermore, the ring will be of suficient thickness tomaintain this partial closure both of the passage about the nozzle, andof the nozzles while moving through a certain vertical range. lit isobvious therefore, that if the ring is given various vertical positionswith respect to thenozzles, it will have correspondingly diderentamounts of travel before the air passage about these nozzles is fullyopened. The attachment of the yoke 4 and rod 12 is by means of a pin 30set in the yoke and passing through an elongated slot.31 in the rod. Theobject of this lost motion connection is to permit the ring 15 and yoke14 to acquire a certain momentum before they pick up the valve 13 whichby reason of its tapered form, often sticks slightly and must be liftedwith a certain amount of force.

Adjust-ably mounted in the fuel supply conduit in the casing is a seat16, formed in in the top of a rod 17 which is hollow for a part of itslength, and is provided with lateral apertures 18 leading to the hollowportion, these apertures permitting the entrance of fuel from thelateral fuel conduit 3 to the interior of this rod, and therefore to theupper part of the fuel nozzle. The upper spring 19 disposed within theextension on the fuel nozzle. The hollow rod 17 extends exteriorly ofthe casing to the bottom, where it is provided with a handle 20 for adustment, and it will be seen that by moving this rod upward through thefuel conduit, it will force the needle valve 13 upward, and with it thering 15 which closes the air passage about the nozzles' Thus the initialposition of the ring will be varied without opening the valve in thefuel supply conduit, and when the ring 15 is finally opened it will haveto move only a short distance, and thus will open the fuel valve acorrespondingly smaller amount than it would be opened ifthe ring movedthrough its normal range of movement, as would be necessary if the ringwere positioned as shown in Fig. 2, where it is directly 0pposed to'thefuel nozzles.

By means of the mechanism described above, it is possible to secure avery accurate adjustment of the fuel and air, and this is securedwithout the usual complicated mechanism which is employed where acarbureter of the float type is used. The difficulties which haveusually been met with in the mix-valve type of carbureters, are in thepresent constructlon entirely eliminated, and this is secured by meansof a very SlIIlple construction having but one moving and one adjustablepart.

It will be seen that the ring 15, when in the position shown in Fig. 2,will partially close the inlet opening for the air past the nozzles 9although a small amount of air will pass by these nozzles through thesemicircular openings 35 around the ends of the same. When the motor isstarted some air will be drawn through these semi-circular holes 35, andin this way any sudden blowing open of the ring valve 15 is prevented.Instead, this valve will be opened gradually, but will acquiresuflicient momentum to pull the valve 13 open, after a certain amount oftravel, in case the latter member, by reason of its contour, shouldstick. In this way it is possible to use a very gradually tapered pin orvalve 13 which affords a very accurate and gradual opening of the fuelvalve. The fuel economy of the carbureter is greatly increased by thisfeature.

Other modes of applying the principle of my invention may be employedinstead of the'one explained, change being made as regards the mechanismherein disclosed, provided the means stated by any of the followingclaims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as myinvention 1. In a carbureter, the combination of a casing constituting acarbureting chamber, a plurality of radially disposed fuel nozzlesterminating equidistantly from the wall of sage about said fuel nozzleand positioned to have a certain amount of travel before fully opening,and means adjustably connecting said valves and adapted to vary theamount of travel of said air valve before movement of said fuel valve beins.

3. In a carbureter, the combination of a casing constltuting acarbureting chamber, a fuel supply nozzle terminating centrally insaidcasing, a gradually tapered valve normally closing said fuel nozzle,an air valve normally partially closing the passage about said fuelnozzle and positioned to have a certain amount of travel before fullyopening, and lost motion connections between said two valves permittingsaid air valve to have a certain amount of travel before said fuel valveis opened.

4. In a carbureter, the combination of a casing constituting acarbureting chamber, a fuel supply conduit mounted centrally therein, adisk connected to the top of said fuel supply conduit and. provided witha series of laterally extending conduits connecting with such fuelsupply conduit, an air valve disposed between said disk and the wall ofsaid casing and partially closing the passage therebetween, a fuel valveextending into said disk and normally closing said fuel conduit, andlost motion connections between said two valves permitting a certainopening movement of said air valve before opening of said fuel valvebegins.

passage therebetween, a gradually tapered i aaaaw fuel valve extendinginto said disk and normally closing said fuel conduit, and lost motionconnections between said two valves permitting said air valve to travela certain distance before opening of said fuel valve begins.

6. In a carbureter, the combination of a casing constituting acar'buretingchamber, a fuel supply conduit mounted centrally therein, adisk connected to the top of said fuel supply conduit and provided witha series of laterally extending conduits connecting with such fuelsupply conduit, said disk being provided with recesses about the ends ofsuch conduits, an air valve disposed between said disk and the wall ofsaid casing and partially closing the passage therebetween, a graduallytapered fuel valve extending into said disk and normally closing saidfuel conduit, and lost motion connections between said two valvespermitting said air valve to travel a certain distance before opening ofsaid fuel valve begins.

Signed by me this 30th day of November, 1915.

ANTHONY COSTA.

Attested by- H. B. FAY, D. S. Davms.

